This game is solid ,simplistic and generally a lot of fun. With a simple concept of a asteroid like shooter game but instead you stay in one spot defeat aliens and purchase upgrades. I think the sprites on this game and the overall polish is decent and fits the theming well. as for the use of the theme obviously it is going for a Si-Fi space theme and I think it fits that pretty much perfectly. The game is set in a endless void of space where you are in a space ship being attacked by aliens. Overall things could be improved such as adding even more sounds and music and generally the idea of a space shooter is very over done. But if you work on this and add more original ideas this will be even better. Pretty soild.